using System;
using System.Text;
using System.util;

/*
 * $Id: LangAlt.cs 106 2009-12-07 12:23:50Z psoares33 $
 * 
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2009 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace iTextSharp.text.xml.xmp {
    public class LangAlt : Properties {

        /** Key for the default language. */
        public const String DEFAULT = "x-default";

        /** Creates a Properties object that stores languages for use in an XmpSchema */
        public LangAlt(String defaultValue) {
            AddLanguage(DEFAULT, defaultValue);
        }

        /** Creates a Properties object that stores languages for use in an XmpSchema */
        public LangAlt() {
        }

        /**
         * Add a language.
         */
        public void AddLanguage(String language, String value) {
            this[language] = XmpSchema.Escape(value);
        }

        /**
         * Process a property.
         */
        protected internal void Process(StringBuilder buf, String lang) {
            buf.Append("<rdf:li xml:lang=\"");
            buf.Append(lang);
            buf.Append("\" >");
            buf.Append(this[lang]);
            buf.Append("</rdf:li>");
        }

        /**
         * Creates a String that can be used in an XmpSchema.
         */
        public override String ToString() {
            StringBuilder sb = new StringBuilder();
            sb.Append("<rdf:Alt>");
            foreach (String s in this.Keys)
                Process(sb, s);
            sb.Append("</rdf:Alt>");
            return sb.ToString();
        }
    }
}
